All definitional requirements for amnestic transtorno are met. The memory symptoms are judged to be the direct consequence of uso of a specified psychoactive substance other than alcohol; sedatives, hypnotics or anxiolytics; or volatile inhalants. The intensity and duration of uso of the specified psychoactive substance must be known to be capable of producing memory impairment. The memory impairment may develop during or soon after specified psychoactive substance intoxicação or abstinência, but its intensity and duration are substantially in excess of those normally associated com these conditions. The symptoms are not better accounted for by another transtorno or medical condition, as might be the case if the amnestic symptoms preceded the onset of the specified psychoactive substance.